What are the common issues in the ignition system of an Audi 80?

I have been experiencing problems with the ignition system of my Audi 80. The engine seems to have trouble starting and the car sometimes stalls while driving. I have also noticed a decrease in fuel efficiency. Any suggestions on what could be causing these problems and how I can fix them?

One common issue in the ignition system of an Audi 80 is a faulty spark plug. It can cause difficulties in starting the engine and can also lead to stalling. I suggest checking and replacing the spark plugs if needed. Also, make sure to use high-quality spark plugs to ensure better performance.

Another possible problem could be a failing ignition coil. This can result in misfiring and can also affect the fuel efficiency. I recommend getting the ignition coils checked and replaced if necessary. It is also important to have them replaced with high-quality ones to avoid further issues.